Plant population is crucial to yield enhancement of white cumin (Trachyspermum ammi) in northwestern ethiopia

摘要

© 2020, Indian Society of Agronomy. All rights reserved.A field experiment was conducted during August 2017 and January 2018 at Dembia district of Ethiopia, to de-termine the optimum plant population of white cumin Trachyspermum ammi (L.) Sprague ex Turrill by adjusting inter-and intra-row spacings. The experiment consisted of a complete randomized block design with 4 inter-row spacings (30, 40, 50 and 60 cm) and 3 intra-row spacings (10, 15 and 20 cm), replicated 3 times. The maximum mean days to flowering (92 days) were recorded in plant spacing of 50 cm × 20 cm. The highest numbers of pri-mary and secondary branches were obtained in 60 cm × 20 cm spacing. The maximum numbers of umbels and umbellets were recorded in 40 cm × 20 cm spacing. The interaction effects of spacings on plant height, biological yield, seed yield, and harvest index were significant, while those on days to flowering and maturity, number of pri-mary and secondary branches, number of umbels and umbellets, and 1,000-seed weight were non-significant. It is concluded that white cumin should be planted at the spacing of 40 cm × 10 cm in Dembia district and similar other agroecological areas of Ethiopia to achieve the maximum yield.